cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ib_addr.h (7839B)


      1/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
      2/*
      3 * Copyright (c) 2005 Voltaire Inc.  All rights reserved.
      4 * Copyright (c) 2005 Intel Corporation.  All rights reserved.
      5 */
      6
      7#ifndef IB_ADDR_H
      8#define IB_ADDR_H
      9
     10#include <linux/ethtool.h>
     11#include <linux/in.h>
     12#include <linux/in6.h>
     13#include <linux/if_arp.h>
     14#include <linux/netdevice.h>
     15#include <linux/inetdevice.h>
     16#include <linux/socket.h>
     17#include <linux/if_vlan.h>
     18#include <net/ipv6.h>
     19#include <net/if_inet6.h>
     20#include <net/ip.h>
     21#include <rdma/ib_verbs.h>
     22#include <rdma/ib_pack.h>
     23#include <net/net_namespace.h>
     24
     25/**
     26 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
     27 * @src_dev_addr:	Source MAC address.
     28 * @dst_dev_addr:	Destination MAC address.
     29 * @broadcast:		Broadcast address of the device.
     30 * @dev_type:		The interface hardware type of the device.
     31 * @bound_dev_if:	An optional device interface index.
     32 * @transport:		The transport type used.
     33 * @net:		Network namespace containing the bound_dev_if net_dev.
     34 * @sgid_attr:		GID attribute to use for identified SGID
     35 */
     36struct rdma_dev_addr {
     37	unsigned char src_dev_addr[MAX_ADDR_LEN];
     38	unsigned char dst_dev_addr[MAX_ADDR_LEN];
     39	unsigned char broadcast[MAX_ADDR_LEN];
     40	unsigned short dev_type;
     41	int bound_dev_if;
     42	enum rdma_transport_type transport;
     43	struct net *net;
     44	const struct ib_gid_attr *sgid_attr;
     45	enum rdma_network_type network;
     46	int hoplimit;
     47};
     48
     49/**
     50 * rdma_translate_ip - Translate a local IP address to an RDMA hardware
     51 *   address.
     52 *
     53 * The dev_addr->net field must be initialized.
     54 */
     55int rdma_translate_ip(const struct sockaddr *addr,
     56		      struct rdma_dev_addr *dev_addr);
     57
     58/**
     59 * rdma_resolve_ip - Resolve source and destination IP addresses to
     60 *   RDMA hardware addresses.
     61 * @src_addr: An optional source address to use in the resolution.  If a
     62 *   source address is not provided, a usable address will be returned via
     63 *   the callback.
     64 * @dst_addr: The destination address to resolve.
     65 * @addr: A reference to a data location that will receive the resolved
     66 *   addresses.  The data location must remain valid until the callback has
     67 *   been invoked. The net field of the addr struct must be valid.
     68 * @timeout_ms: Amount of time to wait for the address resolution to complete.
     69 * @callback: Call invoked once address resolution has completed, timed out,
     70 *   or been canceled.  A status of 0 indicates success.
     71 * @resolve_by_gid_attr:	Resolve the ip based on the GID attribute from
     72 *				rdma_dev_addr.
     73 * @context: User-specified context associated with the call.
     74 */
     75int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
     76		    struct rdma_dev_addr *addr, unsigned long timeout_ms,
     77		    void (*callback)(int status, struct sockaddr *src_addr,
     78				     struct rdma_dev_addr *addr, void *context),
     79		    bool resolve_by_gid_attr, void *context);
     80
     81void rdma_addr_cancel(struct rdma_dev_addr *addr);
     82
     83int rdma_addr_size(const struct sockaddr *addr);
     84int rdma_addr_size_in6(struct sockaddr_in6 *addr);
     85int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
     86
     87static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
     88{
     89	return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
     90}
     91
     92static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
     93{
     94	dev_addr->broadcast[8] = pkey >> 8;
     95	dev_addr->broadcast[9] = (unsigned char) pkey;
     96}
     97
     98static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
     99				    union ib_gid *gid)
    100{
    101	memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
    102}
    103
    104static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
    105{
    106	return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
    107}
    108
    109static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
    110{
    111	return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
    112}
    113
    114static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
    115{
    116	switch (addr->sa_family) {
    117	case AF_INET:
    118		ipv6_addr_set_v4mapped(((struct sockaddr_in *)
    119					addr)->sin_addr.s_addr,
    120				       (struct in6_addr *)gid);
    121		break;
    122	case AF_INET6:
    123		*(struct in6_addr *)&gid->raw =
    124			((struct sockaddr_in6 *)addr)->sin6_addr;
    125		break;
    126	default:
    127		return -EINVAL;
    128	}
    129	return 0;
    130}
    131
    132/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
    133static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
    134{
    135	if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
    136		struct sockaddr_in *out_in = (struct sockaddr_in *)out;
    137		memset(out_in, 0, sizeof(*out_in));
    138		out_in->sin_family = AF_INET;
    139		memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
    140	} else {
    141		struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
    142		memset(out_in, 0, sizeof(*out_in));
    143		out_in->sin6_family = AF_INET6;
    144		memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
    145	}
    146}
    147
    148/*
    149 * rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
    150 * They are not applicable to RoCE.
    151 * RoCE GIDs are derived from the IP addresses.
    152 */
    153static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
    154{
    155	memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
    156	       sizeof(*gid));
    157}
    158
    159static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
    160{
    161	memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
    162}
    163
    164static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
    165{
    166	memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
    167}
    168
    169static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
    170{
    171	memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
    172}
    173
    174static inline enum ib_mtu iboe_get_mtu(int mtu)
    175{
    176	/*
    177	 * Reduce IB headers from effective IBoE MTU.
    178	 */
    179	mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
    180		     IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
    181		     IB_ICRC_BYTES);
    182
    183	if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
    184		return IB_MTU_4096;
    185	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
    186		return IB_MTU_2048;
    187	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
    188		return IB_MTU_1024;
    189	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
    190		return IB_MTU_512;
    191	else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
    192		return IB_MTU_256;
    193	else
    194		return 0;
    195}
    196
    197static inline int iboe_get_rate(struct net_device *dev)
    198{
    199	struct ethtool_link_ksettings cmd;
    200	int err;
    201
    202	rtnl_lock();
    203	err = __ethtool_get_link_ksettings(dev, &cmd);
    204	rtnl_unlock();
    205	if (err)
    206		return IB_RATE_PORT_CURRENT;
    207
    208	if (cmd.base.speed >= 40000)
    209		return IB_RATE_40_GBPS;
    210	else if (cmd.base.speed >= 30000)
    211		return IB_RATE_30_GBPS;
    212	else if (cmd.base.speed >= 20000)
    213		return IB_RATE_20_GBPS;
    214	else if (cmd.base.speed >= 10000)
    215		return IB_RATE_10_GBPS;
    216	else
    217		return IB_RATE_PORT_CURRENT;
    218}
    219
    220static inline int rdma_link_local_addr(struct in6_addr *addr)
    221{
    222	if (addr->s6_addr32[0] == htonl(0xfe800000) &&
    223	    addr->s6_addr32[1] == 0)
    224		return 1;
    225
    226	return 0;
    227}
    228
    229static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
    230{
    231	memcpy(mac, &addr->s6_addr[8], 3);
    232	memcpy(mac + 3, &addr->s6_addr[13], 3);
    233	mac[0] ^= 2;
    234}
    235
    236static inline int rdma_is_multicast_addr(struct in6_addr *addr)
    237{
    238	__be32 ipv4_addr;
    239
    240	if (addr->s6_addr[0] == 0xff)
    241		return 1;
    242
    243	ipv4_addr = addr->s6_addr32[3];
    244	return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
    245}
    246
    247static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
    248{
    249	int i;
    250
    251	mac[0] = 0x33;
    252	mac[1] = 0x33;
    253	for (i = 2; i < 6; ++i)
    254		mac[i] = addr->s6_addr[i + 10];
    255}
    256
    257static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
    258{
    259	u16 vid;
    260
    261	vid = dgid->raw[11] << 8 | dgid->raw[12];
    262	return vid < 0x1000 ? vid : 0xffff;
    263}
    264
    265static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
    266{
    267	return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
    268}
    269
    270#endif /* IB_ADDR_H */